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Built 2026-10-17 (17 October 2026)

Atchafalaya Threshold Days by Year

5 fixed thresholds counted per year at Atchafalaya (USC00160367): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Atchafalaya Thresholds

  • Atchafalaya: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1961 with 54.
  • Atchafalaya: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1953 with 30.
  • Atchafalaya: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1953 with 13.
  • Atchafalaya: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 1932 with 3.
  • 5 fixed thresholds have at least one qualifying day at Atchafalaya.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Atchafalaya Days per year at Atchafalaya with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 54 in 1961. 02040601931: 411932: 361933: 311934: 441935: 311936: 271937: 351938: 381939: 351940: 511941: 491942: 431943: 371944: 471945: 391946: 501947: 441952: 501953: 491954: 191957: 461960: 371961: 541962: 341963: 381964: 371965: 311966: 461967: 391968: 371931193419371940194319461953196019631966
Days per year at Atchafalaya with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 54 in 1961.
Days with 10 mm (0.39 in) or more of precipitation per year at Atchafalaya
YearDaysDecade average
19314135.3
19323635.3
19333135.3
19344435.3
19353135.3
19362735.3
19373535.3
19383835.3
19393535.3
19405145
19414945
19424345
19433745
19444745
19453945
19465045
19474445
19525041
19534941
19541941
19574641
19603739.2
19615439.2
19623439.2
19633839.2
19643739.2
19653139.2
19664639.2
19673939.2
19683739.2
First to last qualifying date each year at Atchafalaya For each year, a bar from the first to the last day at Atchafalaya meeting 10 mm (0.39 in). 1931: 5 January 1931 to 31 December 19311932: 5 January 1932 to 27 December 19321933: 8 January 1933 to 31 December 19331934: 4 January 1934 to 27 December 19341935: 21 January 1935 to 31 December 19351936: 2 January 1936 to 11 December 19361937: 5 January 1937 to 23 December 19371938: 2 January 1938 to 27 December 19381939: 4 January 1939 to 25 December 19391940: 7 January 1940 to 27 December 19401941: 2 January 1941 to 23 December 19411942: 1 January 1942 to 28 December 19421943: 7 January 1943 to 27 December 19431944: 1 January 1944 to 18 December 19441945: 1 January 1945 to 25 December 19451946: 5 January 1946 to 19 December 19461947: 1 January 1947 to 14 December 19471952: 28 January 1952 to 31 December 19521953: 2 January 1953 to 30 December 19531954: 16 January 1954 to 28 December 19541957: 26 January 1957 to 28 December 19571960: 4 January 1960 to 30 December 19601961: 8 January 1961 to 18 December 19611962: 5 January 1962 to 29 December 19621963: 3 January 1963 to 20 December 19631964: 6 January 1964 to 19 December 19641965: 10 January 1965 to 17 December 19651966: 3 January 1966 to 19 December 19661967: 2 January 1967 to 28 December 19671968: 10 January 1968 to 28 December 196819311935193919431947195719631967JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Atchafalaya meeting 10 mm (0.39 in).
First to last qualifying date each year at Atchafalaya
YearFirst dateLast date
19311931-01-051931-12-31
19321932-01-051932-12-27
19331933-01-081933-12-31
19341934-01-041934-12-27
19351935-01-211935-12-31
19361936-01-021936-12-11
19371937-01-051937-12-23
19381938-01-021938-12-27
19391939-01-041939-12-25
19401940-01-071940-12-27
19411941-01-021941-12-23
19421942-01-011942-12-28
19431943-01-071943-12-27
19441944-01-011944-12-18
19451945-01-011945-12-25
19461946-01-051946-12-19
19471947-01-011947-12-14
19521952-01-281952-12-31
19531953-01-021953-12-30
19541954-01-161954-12-28
19571957-01-261957-12-28
19601960-01-041960-12-30
19611961-01-081961-12-18
19621962-01-051962-12-29
19631963-01-031963-12-20
19641964-01-061964-12-19
19651965-01-101965-12-17
19661966-01-031966-12-19
19671967-01-021967-12-28
19681968-01-101968-12-28

Every Fixed Threshold

Fixed thresholds at Atchafalaya
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3054196137
25 mm (0.98 in): Days with 25 mm or more rain3030195314
50 mm (1.97 in): Days with 50 mm or more rain301319532
100 mm (3.94 in): Days with 100 mm or more rain18319321
200 mm (7.87 in): Days with 200 mm or more rain2119401

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1931.

Download the Data

  • Data for Atchafalaya threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).